Tube DIY Asylum

Do It Yourself (DIY) paradise for tube and SET project builders.

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It would be best to find an already vetted design

Posted by DAK on June 14, 2017 at 09:22:39:
than to work the kinks out of the UA1 scheme. It would be hard to remove something like the global negative fb circuit since it has a big part in keeping the amp stable. If you replace the fixed fb resistor with a suitable variable one you can see or hear exactly what will happen as you slowly remove the fb. Or just go with a proven design. I think somebody mentioned the "odd watt" scheme which has been made by many people.